
print(1+1) # 2
print(1*31) # 31
print(1-11) # -10 减法运算
print(5/2) # 2.5 出发运算
print(5//2) # 2 整除运算



print(11%2) # 1
print('-----------------------------')
print(2**2) # 4 2的二次方
print(2**3) # 4 2的三次方